* {
    margin: 0;
    padding: 0;
}

#app .header {
    margin: 10px;
    display: flex;
    justify-content: space-between;

}

#app .header input {
    width: 85%;
    height: 30px;
    border: none;
    outline: none;
    background: #f5f5f5;
    text-align: center;
    border-radius: 5px;
}

#app .header span {
    line-height: 30px;
    color: rgb(40, 237, 198);
}

#app .task_num {
    display: flex;
    margin: 10px 0;
}

#app .task_num div {
    width: 100px;
    height: 30px;
    background: rgb(40, 237, 198);
    margin-left: 10px;
    line-height: 30px;
    text-align: center;
    border-radius: 5px;
    color: white;
}

#app .task_num div:nth-child(3) {
    background: red;
}

.list .task_list {
    margin: 10px 0;
    font-weight: bold;
    padding-left: 10px;
}

.list .task {
    width: 95%;
    height: 30px;
    background: rgb(40, 237, 198);
    margin: 10px auto;
    color: white;
    display: flex;
    justify-content: space-between;
    padding: 0 10px;
    align-items: center;
    box-sizing: border-box;
}

.list .task span {
    margin-left: 10px;
}

.list .untask {
    background: red;
}

.list .empty {
    margin-top: 20px;
    text-align: center;

}